高强度钢板成形中零件表面损伤实验

Investigation on Galling in the Forming Process of High Strength Steel

分析总结了板料冲压成形中表面损伤的国内外研究成果,设计了一种带拉延筋的不等转角角锥件以模拟高强度钢板拉深过程中的零件表面损伤缺陷,用最大划痕深度来评价冲压件表面损伤程度.研究结果表明:随着拉深次数的增加,零件表面损伤越来越严重,表面损伤增长速度越来越快;表面硬度低的模具更容易使零件产生表面损伤;变形方式越复杂的变形区域越容易引起表面损伤缺陷.

A review was conducted about the investigation on galling in sheet metal forming operations. A special pyramid part was designed to simulate the galling in the forming process of high strength steel and the largest depth of scoring H was used as the parameter to quantify the galling. The experimental results reveal that galling is more and more severe with the drawing process of parts; the tool with low hardness produces galling more easily than the tool with high hardness; and the more complicated the deformation of sheet metal, the more easily produced the galling.